(Deming, WA)  --  A man and his baby daughter are dead, following a three-vehicle crash on Mount Baker Highway in Whatcom County, Washington.  The Washington State Patrol says the wreck happened around 10:30 yesterday morning on S-R 542 at Mosquito Lake Road.  WSP Sergeant Mark Francis says an elderly man driving a Chevy Suburban crossed the center line, side-swiped a woman, and then crashed head-on into a man and his infant child.  Police say 25-year-old Phillip Moyer and his five-month-old daughter, Penelope, died at the scene.  The man in the Suburban and the woman he sideswiped are each being treated for serious injuries.